Charge Wire 24in 4-Gauge w/Boot

The Charge Wire 24in 4-Gauge w/Boot is a heavy-duty alternator pigtail designed for high-output electrical system upgrades in vehicles running aftermarket alternators, auxiliary batteries, or dual-battery setups. This cable serves as the critical link between your alternator and battery or distribution block, handling the substantial amperage demands that factory wiring cannot reliably support. Whether you're building a daily-driven off-road rig, a mobile workshop, or upgrading to a high-output charging system, this 24-inch charge wire provides the proper gauge and protection needed for safe, efficient power delivery.

Constructed from 4-gauge copper conductor, this alternator pigtail is sized to handle the amperage output of modern high-output alternators without voltage drop or heat buildup that risks battery damage or component failure. The rubber coating provides excellent insulation and flexibility in tight engine bays, resisting oil, coolant, and UV exposure that degrades standard PVC jackets over time. At 24 inches in length, this charge wire reaches from a typical under-hood alternator location to a remote battery, second battery, or fused distribution block without requiring splicing or daisy-chaining, which introduces connection points that concentrate resistance and heat. The integrated boot terminal ensures a secure, corrosion-resistant connection at the alternator output post.

Installers upgrading to 150A, 200A, or higher-output alternators should specify this cable to eliminate undersized OEM charging wiring as a limiting factor in system performance and reliability. The 4-gauge diameter is the industry standard for these applications, balancing current capacity with manageable routing and terminal compatibility. Proper installation includes fusing the alternator output within 18 inches of the alternator case and ensuring terminal connections are crimped and sealed to prevent corrosion—particularly critical in marine, dusty, or high-vibration environments. This charge wire pairs seamlessly with remote battery setups, dual-battery isolator systems, and auxiliary power distribution modules found in expedition vehicles, emergency service vehicles, and high-draw mobile installations.